3*70/17 -7y=21 jak to obliczyc ?;)
3*70/17 -7y=21
210/17-7y=21
-7y=21-210/17
-7y=357/17-210/17
-7y=147/17 /*(-1/7)
y=-21/17=-1 i 4/17
3*70/17-7y=21
210/17-7y-21
-7y=147/17 /:(-7)
y=147/17*(-1/7)
y=-147/119
y=-1i28/119
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3*70/17 -7y=21
210/17-7y=21
-7y=21-210/17
-7y=357/17-210/17
-7y=147/17 /*(-1/7)
y=-21/17=-1 i 4/17
3*70/17-7y=21
210/17-7y-21
-7y=21-210/17
-7y=357/17-210/17
-7y=147/17 /:(-7)
y=147/17*(-1/7)
y=-147/119
y=-1i28/119